They went to the House of Calvierri and Guido proveded a distration while he snuck around to the gate and used his sonic to unlock the gate and enter. He headed down a stone staircase and entered a room with a high roof and a mirror on the wall. On one side of the room there was a door and the other side had a mirror facing the door. Finding it strange he walked over to the mirror and soniced it. Slightly disappointed he found nothing, he turns towards the door. To see five women standing there in white robes. He looks back at the mirror confused and not seeing them reflected in it, he pulls out the sonic and scans one of them. He flips it open and looks at the results.
"Well you're definitely here, but what are you, hmmm?" He ask them.
"Who are you?" They ask in unison.
"How are you doing that? I am loving it." He says cheerily.
"I'll ask you again, signor. Who are you?"
"Why don't you check this out?" He pulls out his psychic paper and shows it to the girls. They stare blankly at it. He turns and looks at it and sees that it is his library card and he realizes that Jack still has the psychic paper. He groans to himself at the trouble Jack could get into with it.
"Pale, creepy girls who don't like sunlight and can't be seen." He stares at them. "Ha. Am I thinking what I think I'm thinking? But the city. Why shut down the city? Unless..."
"Leave now, signor, or we shall call for the Steward, if you are lucky."
"Tell me the whole plan." He pauses and waits for an answer. "One day that will work. Listen, I would love to stay here. This whole thing. I'm thrilled."
The girls teeth turn into needles, and they start to advance on him hissing. Disappointed he turns and heads back up the stairs.
He finds Rose and Jack by the canal. Jack is holding Kiam and the little boy has his head rested on Jack's shoulder.
"Doctor," Rose says excitedly.
"I just met some vampires." He says happily. At the sound of his voice, Kiam lifts up his head and reaches out to him. He takes Kiam in his arms and Kiam sighs and puts his head down on his father's shoulder. He looks over at him and Kiam smiles brightly at him and turns his head away. He starts to turn his head and sees Kiam lift his head a little and peek at him before bursting in to laughter. If you would have asked him three years ago, what distracted him, he wouldn't have thought about a game of peek a boo. But here he was 907 and he was distracted by just that. He continued their game for a few minutes until he hears Rose clear her throat.
"Right," He says turning his attention to her. "I need to get back in that house and I know someone who can help us. Allons-y" and he takes Rose's hand and heads towards Guido's house.
-Dw-
At Guido's house he sat at studied a map of Venice with Jack.
"As you saw, there's no clear way in. The House of Calvierri is like a fortress. But there's a tunnel underneath it, with a ladder and shaft that leads up into the house. I tried to get in once myself, but I hit a trapdoor." Guido tells him.
"You need someone on the inside." Rose says casually.
"No." He says.
"You don't even know what I was going to say." Rose pouts
"That we pretend you're an applicant for the school to get you inside, and tonight you come down and open the trapdoor to let us in." He looks up from the map and smiles at her, before turning his attention back to it.
"Oh. So you do know what I was going to say."
"Are you insane?" Jack asks her.
"We don't have another option."
"He said no, Rose. Listen to him."
"There is another option." Guido points to a collection of barrels behind Jack.
"I work at the Arsenale. We build the warships for the navy." Guido tells them.
Jack walks over and sniffs one of the barrels, "Gunpowder. Most people just nick stationery from where they work. Look, I have a thing about guns and huge quantities of explosive."
"What do you suggest, then? We wait until they turn her into an animal?" Guido Asks.
"I'll be there three, four hours, tops." Rose says.
"No. I can't put you into danger again," he pauses, "But I have to know. We go together, say you're my daughter."
"Your daughter?"
"Brother, then." He tells her.
"Too weird. Fiancé." Jack says. They both look at each other.
"You should do it. I mean, they've already seen the Doctor." Rose tells Jack and Jack shivers under the look that crosses the Doctor's face at him.
"Me" Jack choked out.
"Yeah. You can be my brother." Rose says.
"This whole thing is mental. They're vampires, for God's sake."
"We hope." he says.
"So if they're not vampires?" Rose asks him and he turns to look at her, his face softening from the look he had continued to give Jack.
"Makes you wonder what could be so bad it doesn't actually mind us thinking it's a vampire."
Jack takes Rose into the building and returns without her to where he is waiting with Guido and Kiam by a gondola. "So," he asks Jack as he gets close.
"It worked. She's in."
Guido climbs into the gondola followed by Jack. He hands Kiam over to him before climbing in the Gondola himself.
"Do you really think it's safe to bring Kiam."
"What other choice do I have." He answers with a hint of sadness in his voice, he shakes his head and then trying to sound more cheerful. "Besides why should he get to miss all the fun." He smiles down at his son who is sitting on the bottom of the gondola. "
"We're here." Guido annouces.
"Right. Okay, I'll go first." He turns towards Jack. "If anything happens to me, you take Kiam and go back."
Guido hands them torches and they head down a long tunnel as they near the end he notices a trapdoor before a strange wind blows the torch out. Jack gets on his hands and knees and he climbs on his back and out of the trap door. He leans down and Jack lifts Kiam up at him and he pulls the little boy out. He starts to close the trap door.
"Doctor," Jack says wearily.
He sets Kiam down and leans over and pulls Jack out as well. "Come on now. Where's Rose?"
"I can't see a thing. Just as well I brought this, then." Jack reaches into his pocket and pulls out a tiny penlight. He smiles at Jack and pulls out a small light saber.
"Ultraviolet. Portable sunlight." He says happily.
"Yours is bigger than mine." Jack teases.
"Oh, Jackie Boy you have no idea." He takes Kiam's hand and sets off again. They walk into a courtyard that has several chest in it. He walks over to them and opens it to find a body that looks mummified.
"They've had all the moisture taken out of them." He says after a quick scan with the sonic.
"Sounds like a vampire. Don't they drink your blood and replace it with their own?"
"Yeah, except these people haven't just had their blood taken, but all the water in their entire bodies. Except these ones didn't survive the process" He closes the lid again.
"Who are you?" Voices say in unison behind him. They turn to see six girls standing behind them. He quickly picks up Kiam and looks at Jack. "Run" and they take off down the corridor again. There way is briefly blocked by three people.
He hears Rose say from the room ahead. "She bit me."
The people though continue to block his way.
"This rescue plan. Not exactly watertight, is it?" The female says and he pulls out his UV light and they cower away from him.
"Ah ha!" He says happily. Rose and another girl dressed in white run in. Rose runs straight into his arms and hugs him.
"Quickly, through here." The girl says and starts down a tunnel.
He looks at Rose. "I think it's okay, she untied me." Rose tells him and so they start down the tunnel after her.
"They're not vampires." Rose says as they hurry onward. "I saw them. I saw her. They're not vampires, they're aliens."
They reach a door and he pulls out his sonic. "Classic." He tells her and opens the door. The others catch up them and he passes Kiam to Rose and send them on ahead while he uses the UV light to keep the others at bay.
They make it out another door and into sunlight. Rose and Jack rush down the steps and to the gondola where Guido is waiting for them.
"Quickly, quickly. Get out. Quick. Quick." The girl tells them but as she tries to run out the door as well, the sunlight touches her skin and she recoils backwards.
"Come on. Run." He says noticing she has stopped.
"I can't." She says and she is pulled back into the tunnels and the door is closed. He runs to the door and upon touching it gets shocked. Angry he runs down the stairs and they get into the gondola and head off.
-DW-
He enters the building again alone, having sent the rest back to Guido's where it is safe. He walks straight up to her throne and sits on it and waits for her to come back.
"Long way from Saturnyne, aren't you, Sister of the Water?" He says once he sees her enter.
"No, let me guess. The owner of the psychic paper. Then I take it you're a refugee, like me?" She asks him.
"I'll make you a deal. An answer for an answer. You're using a perception filter. It doesn't change your features, but manipulates the brainwaves of the person looking at you. But seeing one of you for the first time in, say, a mirror, the brain doesn't know what to fill the gap with, so leaves it blank, hence no reflection." He rambles off.
"Your question?"
"Why can we see your teeth?" He asks finally.
"Self preservation over rides the mirage. The subconscious perceives the threat and tries to alert the conscious brain."
"Where's Isabella?"
She smirks at him. "My turn. Where are you from?"
"Gallifrey."
"You should be in a museum. Or in a mausoleum."
"Why are you here?"
"We ran from the Silence. Why are you here?" She retorts.
"A present to cheer someone up. The Silence?"
"They are a religious movement. Saturnyne was lost."
"That's a little far for just a religious movement. So Earth is to become Saturnyne Mark Two? "
"And you can help me. We can build a new society here, as others have. What do you say?"
"Where's Isabella?" He asks not answering her question.
"Isabella?" She asks him.
"The girl who saved my friend."
"Oh, deserters must be executed. Any general will tell you that. I need an answer, Doctor. A partnership. Any which way you choose."
"I don't think that's such a good idea, do you? I'm a Time Lord. You're a big fish. Think of the children." He mocks her.
"Carlo?" She calls out before looking back at him. "You're right. We're nothing alike. I will bend the heavens to save my race, while you philosophize." She pokes at the old wound.
He stands up and goes over to her as Carlo enters and puts his hand on his shoulder. "This ends today. I will tear down the House of Calvierri, stone by stone." He shakes the man's hand off. "And you know why?" He gets right in her face. "You didn't know Isabella's name." He heads outside and hears Carlo call from them to open the gates. He turns and heads back to Guido's house.
-DW-
He examines the puncture wounds on Rose's neck with the sonic. "You're fine." He tells her relieved and hugs her tightly.
"I need to think. Come on, brain. Think" He sits down at the end of the table and runs his fingers through his hair.
"If they're fish people, it explains why they hate the sun."
"Ah. Her planet is overrun so she flees through space. Then she closes off the city and, starts changing the people into creatures like her to start a new gene pool. But they come from the sea. They can't survive on land, so what's she going to do? Unless she's going to do something to the environment to make the city habitable." he groans and stands up. "She's going to sink Venice. And repopulate it with the girls she's transformed." He says.
"You can't repopulate somewhere with just women. You need men unless..." Jack stops as Rose kicks him in the shins and motions down to Kiam who is playing nearby.
"She's got men." Rose says looking at Jack.
"Where?"
"In the canal. She said to me there are ten thousand husbands waiting in the water."
"Only the male offspring survived the journey here. She's got ten thousand children swimming around the canals, waiting for Mum to make them some compatible girlfriends." He scrunches his face in disgust.
There is a loud thump above them. "The people upstairs are very noisy."
"There aren't any people upstairs." Guido says.
"I knew you were going to say that." A window breaks and the girls gather at the doors and windows.
"Aren't we on the second floor?"
He waves the UV light at them, then uses his sonic screwdriver to reveal their true appearance.
"What's happened to them?" Guido asks.
"There's nothing left of them. They've been fully converted. Fish from space."
Jack grabs Kiam and heads down the staircase with Rose.
"Keep moving. Go." he shouts at them.
"Stay away from the door, Doctor." Guido tells him.
"No. Guido, What are you doing?" He watches Guido head back inside. "I'm not leaving you. What are you doing?" He runs to the door and tries to Sonic it open. "Bolted."
He moves back. "Guido," he calls out. He sees Jack and Rose standing nearby. "Run, I'll catch up."
"I'm not leaving you."
"Rose run, I'll be fine." He looks at Jack, who takes Roses hand and they take off.
He hears Guido inside saying "Come on" and he realizes the voice is heading to the corner with the gunpowder. He turns and runs away from the building as an explosion knocks him off of his feet.
He meets up with Jack and Rose at the canal and Rose runs into his arms. They watch as a thunderstorm starts to develop above the tower, and spreads out over Venice. People are screaming and running around frightened. Kiam starts fighting Jack to get away and holding his arms out for the Doctor. Rose takes Kiam from Jack and tries to comfort the little boy but he continues to reach out.
"Rosanna's initiating the final phase." He says.
"We need to stop her. Come on." Rose says.
"No. Get back to the Tardis. Keep you and Kiam safe."
"You can't stop her on your own." Rose says standing her ground.
"Rose, please," He says gently.
She turns with Kiam and Jack and heads off back in the direction of the Tardis.
He makes his way back into the building once more and heads straight for the throne. He rips off the back of it and starts examining the wires inside.
"You're too late. Such determination, just to save one city. Hard to believe it's the same man that let an entire race turn to cinders and ash. Now you can watch as my people take their new kingdom." She taunts him.
"The girls have gone" He says and pulls out his sonic and sets to work.
"You're lying."
"Shouldn't I be dead, hmm? Rosanna, please, help me. There are two hundred thousand people in this city."
"So save them." She says coldly and leaves. He continues to work on the chair and is not surprised when Rose runs in with Kiam and Jack in tow.
"Get out. I need to stabilize the storm." He tells them.
"We're not leaving you." Rose says and he smiles at her. The house shakes, knocking them off their feet.
"What was that?" Jack asks.
"Nothing. Bit of an earthquake."
"An earthquake?" Rose says surprised at his calmness.
"Manipulate the elements, it can trigger earthquakes. But don't worry about them. Worry about the tidal waves caused by the earthquake." He kicks the throne. "Right, Rosanna's throne is the control hub but she's locked the program. Rose, tear out every single wire and circuit in the throne. Go crazy. We need it to shut down and re-route control to the secondary hub, which should also be the generator."
He hooks up a power cable and then runs out of the room and up the stars into the bell tower dragging the cable behind him. He climbs outside on to metal lighting conductor with the help of the cable and then looks down. "Okay," he says simply, seeing how high up he is.
He opens the brass ball at the bottom of the lightening rod to reveal clockwork. Thinking "It can't be this easy," he finds a tiny switch and stops the mechanism. Instantly the rain ceases, the clouds vanish.
He climbs back down and runs back down the stairs and outside to see her standing at the edge of the canal undressing.
"One city to save an entire species. Was that so much to ask?" She asks him.
"I told you, you can't go back and change time. You mourn, but you live. I know, I did it." He tells her edging closer.
"Tell me, Doctor. Can your conscience carry the weight of another dead race? Remember us. Dream of us." She steps into the water and he runs to the edge to try to save her but it is too late. He lays on the edge watching for a few minutes before turning and heading back to the Tardis.
-DW-
That night after everyone had gone to bed, he laid on the bed next to Rose and Kiam watching them sleep. He felt the weight of the universe on his shoulders and he wondered how she could love him, when he was responsible for so many deaths of so many races and so many people.